Importance: Merkel cell carcinoma (MCC) is a rare but aggressive skin cancer. Quantifying the contribution of major potentially modifiable risk factors to the burden of MCC may inform prevention efforts.
Objective: To estimate the population attributable fraction of MCC cases in the US that were attributable to major immunosuppressing conditions (eg, HIV, solid organ transplant, chronic lymphocytic leukemia [CLL]), ambient UV radiation [UVR] exposure, and Merkel cell polyomavirus [MCPyV]).
Background: Cancer risk among people with HIV (PWH) has declined over time as a result of antiretroviral therapy, but it is unclear whether all racial/ethnic groups and transmission risk groups have experienced equal declines.
Methods: We used data on PWH aged ≥20 years old from the HIV/AIDS Cancer Match Study during 2001-2019. We used Poisson regression to assess time trends in incidence rates for each cancer site by racial/ethnicity and risk group, adjusting for age, registry, and sex.
A previous cancer diagnosis can preclude patients from consideration for solid organ transplantation. Statistical models may improve candidate selection. We fitted statistical cure models and estimated 5-year cancer-specific survival (5yCSS) for colorectal cancer patients in the United States using registry data.
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